MG: most of the meals can be prepped and cooked in 30 minutes. Some friends of mine have ignored the lunches and just made doubles of the dinner and had it for dinner and then lunch the next day, reheated on medium in the microwave.

Some of the meals involve roasting pumpkin/beetroot/etc and so take longer - but you can check out the recipes at the start of the week and decide what you are and aren't prepared to do.